This diagnostic condition is typically either a short to ground or an open wire. 44.3.1 Check for Short to Ground Check for short to ground…

This diagnostic condition is typically an open circuit. 44.2.1 Open Circuit Check Check as follows: 1. Disconnect the Idle Validation Switch. 2. Turn the ignition…

This fault is a typically incorrect wiring of the Idle Validation Switch (IVS). 44.1.1 Check Idle Validation Switch Wiring Check as follows: 1. Connect the…

43.1 SPN 527/FMI 9 This fault is typically the J1939 CCVS message from Source #1, #2, or #3 is missing. 43.1.1 Missing J1939 CCVS Message…

42.1 SPN 523/FMI 9 This fault is typically the J1939 ETC2 message is missing. 42.1.1 Missing J1939 ETC2 Message Check Check as follows: 1. Check…

41.1 SPN 523/FMI 19 This fault is typically the transmission current gear signal is erratic. 41.1.1 Erratic Transmission Current Gear Signal Check Check as follows:…

This diagnosis is typically EGR temperature drift (high box). 40.4.1 EGR Temperature Check Check as follows: 1. Visually inspect the EGR cooler for physical damage…

This diagnosis is typically EGR temperature is too high. 40.3.1 EGR Temperature Check Check as follows: 1. Visually inspect the EGR cooler for physical damage,…

This diagnosis is typically EGR temperature circuit failed low. 40.2.1 Short Circuit Check Check for a short circuit as follows: 1. Disconnect the EGR Temperature…

This diagnosis is typically EGR temperature circuit failed high. 40.1.1 Open Circuit/Short to Power Check Check as follows: 1. Turn the ignition the ON (key…